The group is demanding that the Massachusetts Senate candidate come clean about her heritage – a topic that has dominated media coverage of Warren’s bid again incumbent Republican Sen. Scott Brown ever since it was revealed that the Harvard law professor was previously listed as having ethnic minority status.

“You claim to be Cherokee. You forget, it isn’t who you claim, but instead, who claims you. We don’t claim you!” a banner splashed across the top of the group’s website reads. The group argues that Warren has made “false claims of Cherokee ancestry,” and that it is bothered by those who “fraudulently” claim Cherokee heritage.

David Cornsilk, a 53-year-old citizen of the Cherokee Nation who co-created the group, told POLITICO that after a thorough research of Warren’s background, he considers her alleged 1/32 Native American roots “impossible.”

“My mom called me David Crockett when I was little, because my name is David. That doesn’t mean I’m related to David Crockett,” Cornsilk said. “1/32 Cherokee means that her great-great-great grandparent would have been a full-blood and if you have someone who’s a full blood, that means that that person’s entire lineage from that point backward are full-blood. And it would be extremely difficult, and in my opinion impossible, to have not had some of those family members captured within that wide net of historic records.”

Cornsilk, who explained that members of the new group have no intention of getting involved in the politics of the highly anticipated Senate race in Massachusetts, said that if records from Harvard show that Warren’s false claims helped her get a job, the Democratic candidate would owe Cherokees a sincere apology.

“She has not stepped forward and said this was just a family story that got out of hand — and around the dinner table that’s fine, but once it reaches the realm of public scrutiny? All indications are is that something happened. There’s smoke. We haven’t seen the fire yet,” he said.

“Cherokees Demand Truth From Elizabeth Warren” also has a Facebook page — initially only visible to members who claimed Cherokee heritage — that has more than 350 members as of Wednesday afternoon.

Warren spokeswoman Alethea Harney said in an emailed statement that Warren is “proud of her family and her heritage, and it is something that her family talked about often when she was growing up” — the same statement that the campaign has been circulating for days — without addressing questions about the group “Cherokees Demand Truth From Elizabeth Warren.”